Definitely and interesting discussion and for all intensive purposes, this discussion seems to be open minded and respectful which I thank you all for contributing.
Now ghosts... I was raised Christian and I was taught not to believe in ghosts. However I was taught that there is spiritual warfare taking place all around us of good and evil, in which I don't believe at all. So ghosts are something we didn't believe but spirits battling it out is something we were taught to believe.
Now, later in life with better understanding I think ghosts are very real but let me explain.
I think that the human mind has godlike limitations,.... meaning no limit. So if someone actually carries a belief strong enough, unknowingly they can create a representing physical counterpart. Whether that be a manifestation of a ghost or the healing of a persons leg or the moving of a mountain. So ghosts, could be something that we actually manifest without really realizing it. Much in the same sense as our physical conditions of our body that we can create and manipulate with our thought process.
So, I don't think it's out of the question that we actually create the energy of what we call ghosts and we can further make them good or evil with our thoughts. Now maybe a ghost is an impression left by another as well. We do have subtle energies surrounding the body and our impressions are left all over the place. When we lay down somewhere, it's possible to identify the subtle energy left behind or the impression. Our thoughts also go forth from us and leave impressions as well.
Basically, I believe that the mind of man can move mountains. Turn stone into water. Part a sea of heal the sick. So manifestation of ghosts is not out of the question. Personally, I've never seen a ghost. I did one time on Beaver Island in the clock tower, hear and feel the presence of a ghost like impression but we we're children at the time and expected to see a ghost because everyone knows that light house is haunted by ghosts. Is it... Probably not but there were about 20 of us up there and we all heard the ghost and could feel the ghost but not see it. It was creepy at the time but it very well could have been a physical manifestation of energy according to our will and anticipation.
On thing we could also consider... We all could be ghosts. Seriously. We could be ghost impressions carrying on a life once lived and we don't even know we are ghosts. Another word could be spirits.